import React, {useEffect, useState,useRef,useContext} from 'react';
import axios from "axios";
import {Button, Table, Modal,Input,Form} from "antd";
import {DeleteOutlined, ExclamationCircleOutlined} from "@ant-design/icons";

const {confirm} = Modal

const NewsCategory = () => {

    const [dataSource,setDataSource]=useState([])
    useEffect(()=>{
        axios.get('/categories').then(res=>{
            const list = res.data
            setDataSource(list)
        })
    },[])
    const columns = [
        {
            title:'ID',
            dataIndex:'id',
            render:(id)=>{
                return <b>{id}</b>
            }
        },
        {
            title: '栏目名称',
            dataIndex: 'title',
            onCell: (record) => ({
                record,
                editable: true,
                dataIndex: 'title',
                title: '栏目名称',
                handleSave: handleSave,
            })
        },
        {
            title: '操作',
            render:(item)=>{
                return <div>
                    <Button shape="circle" danger icon={<DeleteOutlined/>}
                            onClick={()=>{confirmDel(item)}}/>
                </div>
            }
        }
    ]

    const handleSave=(record)=>{
        setDataSource(dataSource.map((item)=>{
            if(item.id===record.id){
                return {
                    id:item.id,
                    title:record.title,
                    value:record.title
                }
            }
            return item
        }))
        axios.patch(`/categories/${record.id}`,{
            title:record.title,
            value:record.title
        })
    }

    function confirmDel(item) {
        confirm({
            title: '确定要删除吗?',
            icon: <ExclamationCircleOutlined />,
            onOk() {
                deleteMethod(item);
            },
            onCancel() {
                console.log('取消');
            },
        });
    }

    const deleteMethod = (item) =>{
        setDataSource(dataSource.filter(data=>data.id!==item.id))
        axios.delete(`/categories/${item.id}`)
    }
    const EditableContext = React.createContext(null)

    const EditableRow = ({ index, ...props }) => {
        const [form] = Form.useForm();
        return (
            <Form form={form} component={false}>
                <EditableContext.Provider value={form}>
                    <tr {...props} />
                </EditableContext.Provider>
            </Form>
        );
    };

    const EditableCell = ({
                              title,
                              editable,
                              children,
                              dataIndex,
                              record,
                              handleSave,
                              ...restProps
                          }) => {
        const [editing, setEditing] = useState(false);
        const inputRef = useRef(null);
        const form = useContext(EditableContext);
        useEffect(() => {
            if (editing) {
                inputRef.current.focus();
            }
        }, [editing]);

        const toggleEdit = () => {
            setEditing(!editing);
            form.setFieldsValue({
                [dataIndex]: record[dataIndex],
            });
        };

        const save = async () => {
            try {
                const values = await form.validateFields();
                toggleEdit();
                handleSave({ ...record, ...values });
            } catch (errInfo) {
                console.log('Save failed:', errInfo);
            }
        };

        let childNode = children;

        if (editable) {
            childNode = editing ? (
                <Form.Item
                    style={{
                        margin: 0,
                    }}
                    name={dataIndex}
                    rules={[
                        {
                            required: true,
                            message: `${title} is required.`,
                        },
                    ]}
                >
                    <Input ref={inputRef} onPressEnter={save} onBlur={save} />
                </Form.Item>
            ) : (
                <div
                    className="editable-cell-value-wrap"
                    style={{
                        paddingRight: 24,
                    }}
                    onClick={toggleEdit}
                >
                    {children}
                </div>
            );
        }

        return <td {...restProps}>{childNode}</td>;
    };

    return (
        <div>
            <Table dataSource={dataSource} columns={columns} pagination={{pageSize:10}} rowKey={item=>item.id}
                   components = {{
                       body:{
                           row: EditableRow,
                           cell: EditableCell
                       }
                   }}/>
        </div>
    );
};

export default NewsCategory;